Jack



Aug. 28, 1923.

.l. H. BURKHOLDER JACK Smvcmtoz "i -BVRHNOLUEQ :s sheets-Sheet 1 FiledAug. 25, 1921 Aug. 28, 1923.

J. H. BURKHOLDER JACK 1921 3 Sheets-Sheet 2 Filed Aug. 25,

m um wm E .M uw

Aug. 28, i923.

iwan? J. H. BURKHOLDER JACK Filed Ag. 25 1921 3 Sheets-Shet 3 5mm/woz3". H .BURKHQLDER a modified form of the'invention.

Patented Aug. 28, 1923.

JOHN RJBURKHLDER, or ASHLAND, OHIO, AssiGNon To 'ELTEVMANUFAO'TURINGCOMPANY, or ASHLAND, onio.V Y Y l f JACK.

.Applicationy led August 25, 1921. Serial No. 495,163.

To @ZZ whom t may concern.'

Be it known that I, JOI-IN H. BUnKHoLDnr., a citizen of the UnitedStates, residingat Ashland, in the county of Ashland and State of Ohio,have invented certain, new and useful Improvements in a Jack, of whichthe following is a. specification.

rIhe present jack is mademainly of pressed sheet met-al to provide astructure of relatively light weight, in which the parts are especiallyconstructed to facilitate their assembly and connection, toY promoteease of p operation, and to give in union the strength and durabilityrequired to lift and support the weight of an automobile or other heavyload. c p

In the drawings accompanying thisapplication, Fig. 1 is a` verticalsection of a stand! ard and a side eleva-tion of the working'partsItherein and Fig. 2 vis a similar view with the operating lever raisedand the left pawl disengaged from the rack bar as .in loweringoperations. Fig. 3 is a rear elevation of Fig. 2, and Fig. 4'is a sideand sectional view. of Fig. 5 is a horizontal section of the jack online 5--5 of Fig. 7, and Fig. 6 is a horizontal section on line 6 6, ofFig. '8. Figs. .7 and 8 are side and sectional views corresponding toFig. 1, exceptingthat the pawl tripping device is set incan inactiveposition asin lifting operations. Figs. y9 to 20, inclusive,'are

perspective views of the separate. pieces from which the jack is huilt.-The jack comprises a body 2 of sheet metal stamped or folded to providea U- shaped standard in which two vertical guiding ribs 3&3 are pressedinwardly in the opposing side walls 4-4 at the top,Y thereof near thefront wall 5 so that aratchet lift bar Gmay be supported.verticallyin aslidable position therein with the sides of the bar engaged only withsaid ribs.. However, bar 6 also has a cross pin 7 at its lower end whichassistsin stabilizingthe ,lift` bar in guiding it in its niovement'byengage- Y nient with the sides 4 of body 2, and the cross pin alsoprevents the vlift bar from being withdrawn entirely from the standard,be-

cause the ends of the pin are adapted to en gage the bottom ends of theribs 3 and limit the upward movement of the lift bar. short connectingcross piece 8 Vis inserted within aligned slots 9 in the two side walls4 to further confine the lift bar within standard 2 Vand this crossvpiece also acts as a brace between the sides 4. The upper end ofstandard 2 is cut away at an, angle and the sides united together byrivets 'or bolts 10 which pass through loops or-hooks 11 of a separatebracing and closure strip of metal 12 placed between the side walls 4flush with the upper inclined edges thereof. Other rivets or bolts 13and 14 unite the sides V4 midlength and near the bottom end thereof, anda second bracing and closure plate 15 having hook-shaped ends isfastened by said bolts or rivets 13--14l between said sides, but thespace. between strip 12 and plate .15Y is Vleft open to permit a socketmember 17 to Y oscillate within limits therein. The bottom of standard2l is closed by a flat base plate 1S which is united to the sides 4 byseparate anOle vplates 19. p.

)Scilla-tory member 17isniade of two stamped sheet-metal sections havingn perforated flanges 214 united face toj face by rivets to provide asocket for an operating lever 22', and portions of these sections areoiset laterally and terminated in rounded end edges with a stopAshoulder 23 adapted to strike the bottom edge of cross piece to limitthe downstrokeof lever 22. Os-v cillatory member 17 is free to rockfonashort shaft 24 vextending through Vthe sides'of standard'2, and acheckpawl 25 is pivot-ally supported .upon shaft 24 between the oli'set sidesof member 17 which carryv a cross lpin 26 adapted to support a lift pawl27. `These pawls cofact in raising and lowering lift bar 6, and a singlecoiled spring 28 is adapted' to press both pawls into engagement withthe ratchet teeth on lift lbar 6A unless this movement is coiinteractedby a tripping device 29 having` a more powerful con- 4trolling spring30. vl/Veaker spring 28 has one extremity 31 extending downwardly'into ashallow groove 32 in the vrearsid'e of-lift pawl 27, whilel its oppositeend 33'eXtends upwardly from a bent connecting extension 34 lpivotally'engaged with a perforatedrear 35 on check vpawl 25. The position ofcoiled ber 29 is inclined in respect to the parallel sides so that thedownwardly-extending fingers 37 and 38 on pawls 25 Vand 27,respectively, may ride thereon 'in ,tripping said pawls alternately uponthe reverse strokes Y of lever ,18 in lowering the lift bar 6 asdelineated in Figs. 1 land 2. Stronger spring 130 acts to tilt the rea-rend of tripper `mem- .ber 29 Vdownwardly andth-efront end upwardly aslong as the bent connecting terminal v39 of said spring is at one sideof pivot 13, but when tripping member Qfl9ris placed at a reverseinclination as v`shown in Figs. 7 and Sithe pull of the spring is Ionthe dead center or slightly onfthe opposite side of pivot 13 andthetripperV member lis re` tiredan-d held inactive.A In this inactiveposition the pawls co-act to vraise the lift bar Y step by s'tep whenthe lever is operated.

The longer side of tripper member 29 has Ya lateral lip 40 to permitthe'thumb' ordinger tov :press and tilt said member on its pivot, andspring 30 is connected atits lower end tothe inw'ardlyibent end of plate15 to facilitate the assembly fot said parts. rThe Yupper end oi. plate15 is also narrowedor cu-t away at each side to permit trippermember"29' to beY pivoted on the bolt or rivet 13 and to permit the upperrendet vspring 30 to Y operate freely lani-dto extend outside while i Urthe mai-n portion Aof Lthe `slrring is concealed and protected by theplate. j

'ln Fig. i l show the same ack provided with a shorter rear closureplate 15', a slightly modified tripper member 29, and 4curved leafspring 30 engaging a'nd'mounted lupon said parts to control the actionfot the tripper member.

1What I claim is:

1. In a jack, a cl-shaped standard, a ratchet bar sli'dably mountedwithin said standard, `an oscillatory lever mounted between the sides ofsaid standard, a check pawl and a litt pawl associ-ated with said leverand said ratchet bar, and a single coiled spring having its oppositeextremities engaged with the respect-ivepawls 'mounted `in Y the bar,vspring means adapted to throw said awls into working engagement withsaid ratchet lift bar, `depending- `fingers upon said pawls, a pivotedtripper member adapted toY be turned into engagement with said fingers,

and a closure plate and Yspring mounted be-Y tween the side walls at therear side ot said standard, the spring having one end thereof connectedwith said tripping member.

3. A jack, comprising ahollow standard, a ratchet litt bar and pawl andlever mechanism mounted withinsaid standard, a .clo- 'sure plate at therear side of said standard beneath said lever and pawll mechanism, afastening bolt for said plate, tripping member for said `pawlspivotarlly mounted upon said bolt, and a spring connected with saidtripping member and said plate.

4. A jack, comprising 4a-fsta'ndard having a lift bar and an oscillatorymember vvand pawls mounted tl'ierein,` said paw'ls having dependinglinge-rs, a boltextending transwerselyY through said standard, atripping member for said pawls having Yparallel sides pivotally engagedwith said bolt and 'an inclined connecting Aportion at rone `end adaptedto engage said lingers, Vand a spring mounted within said standard andconnected with said tripping member.

'5. A jack, comprising a sheet metal bedy *folded intofU-shape'having-la "cr-oss piece betweenits sides parallell'with thetron-tsides 'of saidbody, 'a cross shaft `mounted upon the sides of saidbody opposite said cross piece,

an oscillatory member supported upon said cross shaft made 1n separatesections and united together to Yprgrvide a'1soclretf having anoperating lever, Vsaid sectitms"'beingiol-V set laterally and'terminating inrounded fend edges with stop shoulders adaptedvtoenfgage,

said cross piece, a Llift bar mountedwithin said standard `at the irontside oli .said cross piece, and a lift paw-'l {mounted gpongsaidoscillatory memberbetween `said sha-rt Vand said cross piece.

Signed at Ashland, county or*fish-land,V`

and State' of `(hio, this 6th day ot June, 1921'.V Y

Y Johansen-Knoppen. Y

